Bump codecov/codecov-action from 6 to 7 (#38)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 6 to 7.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v6...v7)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -52,7 +52,7 @@ jobs:
           coverage: ${{ matrix.version == '1' && matrix.os == 'ubuntu-latest' && matrix.arch == 'x64' }}
       - uses: julia-actions/julia-processcoverage@v1
         if: matrix.version == '1' && matrix.os == 'ubuntu-latest' && matrix.arch == 'x64'
-      - uses: codecov/codecov-action@v6
+      - uses: codecov/codecov-action@v7
         if: matrix.version == '1' && matrix.os == 'ubuntu-latest' && matrix.arch == 'x64'
         with:
           fail_ci_if_error: true